Dissolved Oxygen

Dissolved Oxygen (DO) is necessary to sustain most forms of aquatic life. Atmospheric oxygen is introduced into water through the processes of diffusion, aeration and the photosynthesis of aquatic plants. Some of the factors that decrease DO are warm temperatures, decaying organic materials, impaired water movement and over abundant human activity. Excessive organic decay is usually present in swamps, or areas that commonly have low DO content. Times Coffee Shop (Site 2) is a good illustration of such an area and had an extremely low DO reading of 0.7.